# Timeline

## 1988

### GSM 900

Uplink - 890 Mhz to 915 Mhz

Downlink - 935 Mhz to 960 Mhz

### GSM 1800

1710 Mhz to 1785 Mhz

1805 Mhz to 1880 Mhz

## 1995

### GSM 1900

1850 Mhz to 1910 Mhz

1930 Mhz to 1990 Mhz

## 1996

120 GSM Networks

## 2000

150 million GSM users

GSM (Global System for Mobile Communications) is a standard developed to describe protocols for second-generation (2G) digital cellular networks. 

By 1996, there were 120 GSM networks operating globally. By 2000, the number of GSM users had grown to 150 million, showcasing its rapid adoption and widespread usage. 

The frequency band 1930 MHz to 1990 MHz is commonly used for mobile communication services, including GSM, in various regions.